Operation Manual 10. Troubleshooting
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If the inverter is equipped with heating and dehumidification function and the
communication between the temperature & humidity board and the device is
poor, this alarm occurs
The operation LED is green.
10.5 Other Faults
Inverter shuts down shortly after start-up
DC input voltage just reaches the inverter start-up voltage. The voltage will
decrease and inverter will stop when it is under load.
Design the serial and parallel connection in accordance with the open circuit
voltage; increase the input DC voltage; avoid adopting the critical voltage
LCD Display Cannot Start or Stop Inverter
Communication malfunction between the LCD display and the DSP; LCD power
supply malfunction
Check the connection between the LCD display and the DSP when inverter is
voltage-free
Communication Failure with PC
Possible reasons are various. Please refer to the Measure for troubleshooting
Check if the address and the Baud rate of the LCD are the same with that of
PC
Check to ensure the circuits are properly connected and if the RS485
communication is adopted, the A and B ports are connected correctly
Check if the communication converters are matched. Communicate again
after replacing the converter
The monitor disk is installed incorrectly. It is recommended to reinstall the
disk
If all the above-mentioned items are correct and this fault continues, please
replace the PC communication module on the LCD display
The monitor disk might be incompatible with the antivirus software and thus
cannot be installed correctly. You are recommended to disable the antivirus
software and then install the monitor software.
If the fault still occurs, please contact Sungrow
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